CVE-2026-54775

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 6.5 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:github_m
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: —CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

CoreWCF: Kafka consume pump halts permanently on a Kafka tombstone (null-value record), causing persistent endpoint denial of service.

Impact

A CoreWCF service is running and listening on a Kafka topic receiving a null-value record will stop processing new records from that topic.

Preconditions

The attacker has produce/write permission on a topic that CoreWCF is consuming from. If the broker permits anonymous publishes, no authentication is required.

Patches

Fixed in CoreWCF v1.8.1 and v1.9.1

Workarounds

Only allow authenticated writes to a topic

CVSS v3
6.5
EG Score
6.5(low)
EPSS
—
KEV
Not listed

Published

June 19, 2026

Last Modified

June 19, 2026

Vendor Advisories for CVE-2026-54775(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
NuGet(1)
PackageVulnerable rangeFixed inDependents
CoreWCF.Kafka1.9.01.9.1—

Data Freshness Timeline

(refreshed 7× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 13:44 UTCEG score recompute
  2. 2026-07-05 14:11 UTCEG score recompute
  3. 2026-07-04 14:39 UTCEG score recompute
  4. 2026-07-03 15:07 UTCEG score recompute
  5. 2026-07-02 15:34 UTCEG score recompute
  6. 2026-07-01 16:01 UTCEG score recompute
  7. 2026-06-30 16:30 UTCEG score recompute
  8. 2026-06-29 16:59 UTCEG score recompute
  9. 2026-06-28 17:27 UTCEG score recompute
  10. 2026-06-27 17:56 UTCEG score recompute
  11. 2026-06-26 18:24 UTCEG score recompute
  12. 2026-06-25 18:54 UTCEG score recompute
  13. 2026-06-24 19:22 UTCEG score recompute
  14. 2026-06-23 19:36 UTCEG score recompute
  15. 2026-06-22 20:03 UTCEG score recompute
  16. 2026-06-21 20:29 UTCEG score recompute
  17. 2026-06-20 20:58 UTCEG score recompute
  18. 2026-06-19 21:25 UTCEG score recompute

Frequently asked(4)

What is CVE-2026-54775?
CVE-2026-54775 is a medium vulnerability published on June 19, 2026. CoreWCF: Kafka consume pump halts permanently on a Kafka tombstone (null-value record), causing persistent endpoint denial of service. Impact A CoreWCF service is running and listening on a Kafka topic receiving a null-value record will stop processing new records from that topic. Preconditions The…
When was CVE-2026-54775 disclosed?
CVE-2026-54775 was first published in the National Vulnerability Database on June 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-54775?
CVE-2026-54775 has a CVSS v4.0 base score of 6.5 (CNA self-assessment; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-54775?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54775, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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